import static java.lang.Thread.sleep;

public class Demo4 {
    public static void main(String[] args) throws InterruptedException {
        Runnable runnable = new Runnable() {
            @Override
            public void run() {
                while (true) {
                    System.out.println("Thread");
                    try {
                        sleep(1000);
                    } catch (InterruptedException e) {
                        throw new RuntimeException(e);
                    }
                }
            }
        };

        Thread thread = new Thread(runnable);

        thread.start();
        while (true) {
            System.out.println("main");
            sleep(1000);
        }
    }
}
